Needle-guide for sewing-machines.



P. SJOSTROM.

NEEDLE GUIDE FORASEWING MACHINES.

APPLICATION FILED AUG.4. 1915. y I

Patented July 4, 1916.

2 SHEETS-SHEET 1.

Lweor: Peter ASL'I'osZrom,

P. slosTRoM.

NEEDLE GUIDE FOR SEWING MACHINES.

APPLICATION rlLED AUG.4| |915.

1 ,1 90,202u Patented July 4, 1916.

2 SHEETS-SHEET 2.

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.1 sTATRs lPATE PETER SJOSTROM, OF MAPLEWOOD,

MASSACHUSETTS, ASSIGNOR T0 VICTOR SHOE SETTS.

NEEDLE-GUIDE FOR SEWING-MACHINES.

This invention relates to machines for -sewing heavy material such as leather, and

particularly to that class of machines known as welt sewing machines, and -is a division of an application filed by me Feb. 17, 1915, and numbered 9,465. y

The object of the present invention is to provide a new and improved guide forthe' needle movable with the needle for a predeand then adapted t0 remain stationary while the needle continues its movement through the work.

` The invention consists incertain novel features of construction and arrangement of parts which will be fully understood by reference to the description of the drawings and to the claims hereinafter given.

Of the drawings: Figure `1 represents a front elevation of a machine embodying the principles of the present invention, Fig. 2 represents a vertical section of the same, Fig. 3 represents a horizontal section on line 3-3 on Fig. 2, and Fig. 4 represents a detail to be hereinafter described.

Similar characters designate like parts throughout the several figures of the drawmfrs. v

n the drawings, 19 is a connector, the lower end of which is connected to any wellknown form of driving mechanism, while the upper end is pivotally connected to a lever 20 loosely mounted upon a stud 21 nonrevolubly mounted in a boss 22 formed upon the frame 23, the base 24 of which is adapted to be secured to any well-known form of support.

The lever 20 is secured to the gear segment 27, the hub 28 of which is mounted on the stud 21 about the axis of which it is adapted to be oscillated. Y

The teeth of the gear segment 27 mesh with the teeth of the gear 29 secured to a Specication of Letters Patent.

ment 27,` the f of a circle. The shaft 30 has secured thereto a disk 105 which is adapted to oscillate with through a boss 44 vvented from rotating y clamping screw Patented July 4, 1916.

. Original application led February 17, 1915, Serial No. 9,465. Divided and this application filed August 4,

Serial No. 43,898.

shaft 30 mounted in bearings in the frame 23 in which bearings said shaft is adapted to be oscillated by means of the gear segment 27.

During the oscillation of the gear seglever 20 moves through the arc said shaft. To the disk 105 at 105X is pivotally connected one end of a link 106X the opposite end of which is pivotally connected to a radial arm 45X of the needle carrier 45, said carrier 45 being loosely mounted upon the fixed stud 47X about the axis of which it is adapted to be oscillated through the medium of the connector 106X by the oscillatory movement of the carrier 45 is provided needle 47.

An awl carrier 40 provided with an awl 4l is mounted vupon a pin 43 extending formed upon the side of 45, said pin being 'preby means of the with the usual barbed the needle carrier 46. y In a recess in the side of the needle carrier 45 is positioned a spring48 the end of .which bears against the inner face of the awl carrier and tends to move said awl carrier 40 outwardly about the pin 43.

The awl carrier 40 is adapted to be moved toward the needle carrier lever 37 pivoted atv 38 .and operable in any well-known manner, said lever having an adjustable bearing member 39 normally contacting with the awl carrier 40 as 'shown in Fig. 3. The outward movement of the awl 'carrier 40 is limited by the stop member 49 positioned in a tubular member 50 mounted in the frame 23 as shown in Fig. 3.

The tubular member 50 has a diametrical slot 51 at one end in which is positioned the pin 52 mounted in the stop member 49 to prevent said stop member from turning in the tubular member 50. This stop member 49 has a cylindrical shank through and beyond said tubular member 50, the outer end being threaded as at 54,

and having mounted thereon an adjusting nut 55, by whichthe position of the stop shaft 30. The needleV 53 extendingy 45 by means of the member 49 may be determined to regulate the amount of separation of the awl carrier and needle carrier. The stop member 49 is forced outwardly by means of a spring 56, the tension of which is greater than the spring 48, so that under ordinary conditions when the awl carrier is moved away from the needle carrier by the spring 48 its outward movement will be determined by the member when under abnormal conditions to prevent damage to the machine. The spring 56 also serves the purpose of retaining the member 49 in its adjusted position with the hub of the adjusting` nut 55 in contact with the clamping nut 57 of the tubular member 50. The tubular member forms a stud upon which is mounted the presser foot carrier 58 having secured thereto the presser foot 59.

The cam 105 is provided with a cam path 107 in which is positioned a truck 108 mounted upon the rear end of a lever 109 pivotally mounted upon a stud 110. This stud 110 is mounted in a bearing in the frame 23 and extends beyond the outer face of said frame, having mounted upon its outer end an adjusting nut 111 Vbetween which and the outer face of said frame 23 1s a spring 112 tending to retain the face- 113 of the lever 109 in frictional contact with the inner face of the frame 23 so that said lever 109 will remain in any position in which it may be placed until positively acted upon by means of one of the walls of the cam path 107. The lever 109 is provided with an upwardly extending arm 114, the upper end' of which is provided with a thread placing device 115 which forms no part of the present invention, and a detailed description of which it is deemed unnecessary to give inthe present application. The thread placing device 115 is operated at a predetermined time by a blade 125 secured to the needle carrier 45 coming in contact with the arm 117 forming a part of said thread placing device 115 and bending the thread into a horizontal position adapted to be seized by the barb of the needle 47.

The needle carrier 45 is provided with a hub 127 on which is mounted the hub 128 of a needle guide 129, said needle guide havmg a shoulder 130 projecting over the upper edge of the blade 125 and normally held in contact with said blade 125 by means of the spring 131 surrounding the hub 128. This hub 128 is provided with a shouldered projection 132 adapted to engage a stud 133 mounted in a frame 23, said stud 133 limiting the downward movement of the needle guide 129 when the shouldered projection 132 comes into contact with said stop.

As the needle 47 passes down through the work the thread placing device 115 will be moved forward by the action of the cam 107 on the roll 108 and the blade 125 will strike 49, the spring 56 only yielding the arm 117 and cause the lingers 11G to engage the thread T and bend it into a substantially horizontal position. The thread bender 115 will then be moved farther forward so that the thread T will bear against the inside of the needle, thus insuring the thread being seized by the barb of said needle as it moves upwardly through the work.

It is obvious that the needle carrier 45 has an oscillatory movement imparted thereto by the main oscillating shaft 30 and that said carrier has secured thereto and oscillating therewith the blade 125 adapted to operate thc thread placing mechanism 115.

The needle guide 129V is normally held in contact with this blade 125 and is adapted to move therewith a predetermined distance until further forward movement is prevented by the stop mechanism heretofore described.

This forms a very simple and effective mechanism for operating the needle guide, the advantages of which it is believed will be fully apparent without further description.

Having thus described my invention, I claim:

1. In a device of the class described, the combination of a fixed stud; a needle carrier thereon provided with a lateral hub; a needle carried thereby; an awl carrier pivoted to said needle carrier; an awl carried thereby; a spring for normally separating said carriers; a needle guide on said hub; a stop to limit the movement of said guide; a projecting blade secured to the needle carrier; a spring normally retaining said guide in contact with said blade; a stop to limit the movement ofv said guide during the downward movement of the needle; and means for moving said awl carrier toward said needle carrier.

2. In a device of the class described, the combination of a needle carrier; a blade thereon projecting forwardly beyond the front 'face thereof; a needle guide movable about the aXis of said needle carrier; a torsional spring surrounding the needle guide hub for retaining said guide normally in contact with the upper edge of said projecting member and moving it therewith a limited distance; and a stop for limiting the downward movement of said guide prior to the completion of the forward movement of said needle carrier.

3. In a machine of the class described, the combination of a needle carrier; an oscillating member; means for oscillating said member; means for actuating said needle carrier by the oscillatory movement of said oscillating member; a blade secured to said needle carrier and projecting forwardly beyond the front face thereof; a needle guide loosely mounted on the hub of said needle ment of said guide prior to the completion of the forward movement of said carrier.

Signed by me at oston, Mass., this 3rd day of August 1915.

PETER SJOSTROM.

Witnesses WALTER E. LoMBARD, NATHAN C. LOMBARD.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Intenta.

Y Washington, D. C. 

